A window through the walls of our classroom. This is an interactive learning ecology for students and parents in my Pre-Cal Math 20S class. This ongoing dialogue is as rich as YOU make it. Visit often and post your comments freely.

Tuesday, September 9, 2008

Not much happened during class today, although we did continue withExercise 1 from #10 and on.If for some reason you don't have the questions, here they are:

"11- If x = 2 and y = -3, find the values for the following:

A) x + y (x + y) B) 2x² + 3xy

12- Solve these equations:

A) 3 (x - 2) = 4 - (x - 2) B) x [over] 3 + 1 = x - 4

13- Simplify the following expressions:

A) (3x²)(5x³) B) (3x^4)² C) 12x^5 [over] 3x²

14- How many triangles are in this diagram?

15- The area of a triangle is A. If the base is of length b, express the length of the altitude in terms of A and b.

16- The solution to the equation 2x + 3 = 3x + [ink blot] is x= -8 What number is under the ink blot?

17- Find the value of x.

18- Find the value of x. Express your answer to one decimal place.

19- Use trigonometry to find the value of x. Give the answer to two decimal places.

20- Use trigonometry to find x. Give the answer to two decimal places.